Usablity of initial hub view and search problems

[diekhans]

• The initial impression of the hub is it is incredibly slow. It
  takes a long time to load, tracks time out or have too many
  items to display. Interested people have just given up.

  This is caused by the default of open a large number of tracks
  with a megabase region. UCSC Browser initial views are usually
  at gene level with an limited number of interesting tracks showing
  examples of diverse sets of data.

  Limiting what is shown when the data is in S3 is especially important
  due to slower access.

• The group name "Alignment" is not useful. Alignment of what?

• search for a gene symbol fails (e.g. FOXp2)

  Warning: trix search failure for hub_6667426_geneAnnot: Couldn't open https://s3-us-west-2.amazonaws.com/human-pangenomics/T2T/browser/KOLF/bbi/KOLF_DIP.ixx

• segmental duplication tracks would be very useful